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APISearchControllerTutorial using delegation instead of KVO
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// | |
// RequestManager.swift | |
// APISearchControllerTutorial | |
// | |
// Created by Kc on 24/03/2016. | |
// Copyright © 2016 Kenechi Okolo. All rights reserved. | |
// | |
import Foundation | |
import Alamofire | |
import SwiftyJSON | |
protocol RequestManagerSearchResultsDelegate: class { | |
func updateSearchResults(sender: RequestManager) | |
} | |
class RequestManager { | |
weak var delegate: RequestManagerSearchResultsDelegate? | |
var searchResults = [JSON]() | |
var pageString: String { | |
if pageNumber == 1 { | |
return "" | |
} else { | |
return "page=\(pageNumber)&" | |
} | |
} | |
var pageNumber = 1 | |
var hasMore = false | |
func search(searchText: String) { | |
let url = "https://api.stackexchange.com/2.2/search?\(pageString)order=desc&sort=activity&tagged=\(searchText)&site=stackoverflow" | |
print(url) | |
Alamofire.request(.GET, url).responseJSON { [unowned self] response in | |
if let results = response.result.value as? [String:AnyObject] { | |
print("Results: \(results)") | |
let items = JSON(results["items"]!).arrayValue | |
self.hasMore = JSON(results["has_more"]!).boolValue | |
self.searchResults += items | |
if self.delegate != nil { | |
self.delegate?.updateSearchResults(self) | |
} | |
// NSNotificationCenter.defaultCenter().postNotificationName("searchResultsUpdated", object: nil) | |
} | |
} | |
} | |
func getNextPage(searchText: String) { | |
pageNumber += 1 | |
search(searchText) | |
} | |
func resetSearch() { | |
searchResults = [] | |
} | |
} |
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// | |
// SearchResultsTableViewController.swift | |
// | |
// | |
// Created by Kc on 24/03/2016. | |
// | |
// | |
import UIKit | |
import SwiftyJSON | |
class SearchResultsTableViewController: UITableViewController, RequestManagerSearchResultsDelegate { | |
let requestManager = RequestManager() | |
let searchController = UISearchController(searchResultsController: nil) | |
var searchResults: [JSON] { | |
return requestManager.searchResults | |
} | |
var validatedText: String { | |
return searchController.searchBar.text!.stringByReplacingOccurrencesOfString(" ", withString: "").lowercaseString | |
} | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
searchController.searchBar.delegate = self | |
searchController.dimsBackgroundDuringPresentation = false | |
searchController.hidesNavigationBarDuringPresentation = false | |
searchController.searchBar.placeholder = "Enter tag..." | |
definesPresentationContext = true | |
tableView.tableHeaderView = searchController.searchBar | |
requestManager.delegate = self | |
// NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(SearchResultsTableViewController.updateSearchResults), name: "searchResultsUpdated", object: nil) | |
// Uncomment the following line to preserve selection between presentations | |
// self.clearsSelectionOnViewWillAppear = false | |
// Uncomment the following line to display an Edit button in the navigation bar for this view controller. | |
// self.navigationItem.rightBarButtonItem = self.editButtonItem() | |
} | |
func updateSearchResults(sender: RequestManager) { | |
tableView.reloadData() | |
} | |
// MARK: - Table view data source | |
override func numberOfSectionsInTableView(tableView: UITableView) -> Int { | |
// #warning Incomplete implementation, return the number of sections | |
return 1 | |
} | |
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { | |
// #warning Incomplete implementation, return the number of rows | |
return searchResults.count | |
} | |
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { | |
let cell = tableView.dequeueReusableCellWithIdentifier("itemCell", forIndexPath: indexPath) | |
cell.textLabel?.text = searchResults[indexPath.row]["owner"]["display_name"].stringValue | |
cell.detailTextLabel?.text = searchResults[indexPath.row]["title"].stringValue | |
if indexPath.row == searchResults.count - 10 { | |
if requestManager.hasMore { | |
requestManager.getNextPage(validatedText) | |
} | |
} | |
return cell | |
} | |
/* | |
// Override to support conditional editing of the table view. | |
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool { | |
// Return false if you do not want the specified item to be editable. | |
return true | |
} | |
*/ | |
/* | |
// Override to support editing the table view. | |
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) { | |
if editingStyle == .Delete { | |
// Delete the row from the data source | |
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade) | |
} else if editingStyle == .Insert { | |
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view | |
} | |
} | |
*/ | |
/* | |
// Override to support rearranging the table view. | |
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) { | |
} | |
*/ | |
/* | |
// Override to support conditional rearranging of the table view. | |
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool { | |
// Return false if you do not want the item to be re-orderable. | |
return true | |
} | |
*/ | |
/* | |
// MARK: - Navigation | |
// In a storyboard-based application, you will often want to do a little preparation before navigation | |
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { | |
// Get the new view controller using segue.destinationViewController. | |
// Pass the selected object to the new view controller. | |
} | |
*/ | |
// deinit { | |
// NSNotificationCenter.defaultCenter().removeObserver(self) | |
// } | |
} | |
extension SearchResultsTableViewController: UISearchBarDelegate { | |
func searchBarSearchButtonClicked(searchBar: UISearchBar) { | |
requestManager.resetSearch() | |
// updateSearchResults() | |
tableView.reloadData() | |
requestManager.search(validatedText) | |
} | |
} |
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